Mitsubishi Electric MELSEC iQ-F Series FX5 User Manual page 59

Starting using external command signals (CHG)
When the positioning control is started by inputting an external command signal (CHG), the start command can be directly
input to the positioning module. This method eliminates the variation time equivalent to one scan time of the CPU module.
Use the start command when an operation is required to be started as soon as possible, or when the starting variation time is
to be suppressed.
■Starting method
To start the positioning with the external command signal, set [Pr.42] External command function selection beforehand, and
validate [Cd.8] External command valid using a program. After setting those two areas, turn ON external command signals
(CHG).
Setting item
[Pr.42] External command function
selection
[Cd.8] External command valid
■Restrictions
When starting by inputting an external command signal (CHG), the start complete signal ([Md.31] Status: b14) does not turn
ON.
■Time chart for starting
[Cd.184] Positioning start signal
[Cd.190] PLC READY signal
READY signal
([Md.140] Module Status: b0)
Start complete signal
([Md.31] Status: b14)
[Md.141] BUSY signal
Positioning complete signal
([Md.31] Status: b15)
Error detection signal
([Md.31] Status: b13)
External command signal
(from outside)
[Pr.42] External command
[Cd.3] Positioning start No.
[Cd.8] External command valid
Setting Setting details
value
0 Sets "0: Start external positioning".
1 Set 1: "Validate external command".
Operation pattern
v
Positioning data No.
function selection
1(00)
0
1
1 0
Buffer memory address
Axis 1 Axis 2
62 212
1505 1605
Dwell time
t
7 STARTING AND STOPPING
7.1 Starting
7
57